JP2581143B2 - Horse lap time measuring device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bar code and a horse lap time measuring device using the bar code.

[Conventional technology]

In a conventional bar code, a signal is formed by applying a bar-shaped black paint (4) on a highly reflective paper (2) as shown in FIG. A laser beam or the like is projected on the bar code, and the content of the bar code signal is read from the pattern of the reflected light.

On the other hand, when training horse racing, a lap time of 200 m is required, and the timekeeper stops at a rate of one horse per horse to measure the timing when the horse passes through the halong stick set every 200 m. I had a watch and was timing.

[Problems to be solved by the invention]

In the bar code reading, when the laser beam is applied to the bar code and the incident angle of the laser beam is almost perpendicular to the bar code surface as shown in FIG. 9A, there is no problem. If the laser beam enters obliquely and deviates more than perpendicularly, there is almost no reflected light and reading cannot be performed. Therefore, there is a problem that the incident angle θ can be used only about 10 ° in practice.

Also, when measuring the lap time during horse racing training, when measuring the time when the horse passes by looking at the halong stick from a direction perpendicular to the horse's traveling direction, relatively accurate timekeeping can be done, but in the horse's traveling direction When measuring the time the horse passes by looking at the halong bar from a parallel direction, there is a problem that the position is difficult to understand and the measurement error becomes very large.

The present invention has been made in view of such circumstances,
The aim is to use a barcode that can be read accurately even when the angle of incidence of the laser beam deviates from the barcode surface by more than 0 ° when irradiating the barcode with the laser beam. It is an object of the present invention to provide a device for automatically and quickly measuring.

[Means for solving the problem]

The gist of the present invention resides in a "horse lap time measuring device" having the following "barcode", "barcode reader" and "arithmetic processing mechanism".

A bar code comprising a bar-shaped light absorbing portion and a light reflecting portion mounted on the back of the horse so that the reading direction is substantially perpendicular to the traveling direction of the horse, and constituting a signal,
A bar code that uses a light retroreflective material for the light reflection part.

The barcode is installed above the measurement position of the running path of the horse, and the barcode reading direction is substantially perpendicular to the horse traveling direction, and the scanning angle of the reading laser light is approximately 90 degrees. A bar code reader arranged in the reading direction.

An arithmetic processing mechanism for calculating the lap time of the horse from the bar code reader signal and the time signal.

[Action]

The bar code used in the apparatus of the present invention is a bar code in which a bar-shaped light absorbing portion and a light reflecting portion are juxtaposed in a direction substantially perpendicular to the moving direction of the reading irradiation light to constitute a signal. Material is used. As shown in FIG. 4, the light retroreflective material is provided with a plurality of spherical lenses (14) on the surface, and a spacing coat (12) is provided inside the spherical lenses (14). Inside the reflective film (1
6) is provided. Therefore, this spherical lens is refracted twice at the spherical interface as shown in the figure, reflected once, and
゜ Reflected, so that light is reflected in the same direction as the incident direction. Therefore, even if the incident angle of the laser beam deviates from the barcode surface by more than 0 °, the barcode reader can read the signal of the laser beam.

Further, a barcode mounted on the horse surface such that the reading direction is substantially perpendicular to the traveling direction of the horse, and the barcode is installed above the barcode at the place where the horse is to be measured, and the reading direction is Since the bar code reader is provided with a bar code reader which is substantially perpendicular to the traveling direction of the horse and a processing mechanism for calculating the required time of the horse from the signal of the bar code reader and the time signal, the horse is located at the first measurement position. When it is positioned, read it immediately with a barcode reader, record the time and barcode signal at the same time, and when the horse is located at the second or subsequent measurement position, read it again with the barcode reader and simultaneously read the time and barcode signal. The lap time of the horse can be measured if it is recorded and calculated by the arithmetic processing mechanism.

〔Example〕

FIG. 1 is a sectional view showing an example of a bar code used in the apparatus of the present invention, and FIG. 2 is a sectional view showing an example of a light retroreflective material. In FIG. 1, reference numeral 8 denotes a light retroreflective material (8), and a light absorbing material (6) is applied to the surface of the light retroreflective material (8). The light retroreflective material (8)
As shown in FIG. 2, a transparent plastic film (10) is provided on the surface as shown in FIG.
The lower surface of (0) is provided with a spacing coat (12) made of a transparent material, and a plurality of spherical lenses (14) made of spherical glass are embedded in the spacing coat (12). Further, a reflective film (16) is provided below the spacing coat (12), and an adhesive layer (18) and a liner (20) are provided on the lower surface. Therefore, even if laser light enters the bar code of FIG. 1 from an oblique direction, the laser light is reflected in the incident direction. By the way, if the bar code used in the apparatus of the present invention was a bar code which could only be used up to an incident angle of 10 ° conventionally, it could be used sufficiently even at an incident angle of 40 °. In the embodiment of the present invention, the light absorbing material (6) is applied on the light retroreflective material (8) to form the light absorbing part. However, the light retroreflecting material is included in the light absorbing material (6). (8) may be embedded, and the structure of the optical retroreflective material (8) shown in FIG. 2 has been described. However, the structure shown in FIG. 4 or FIG. As shown, an air layer (22) may be provided between the transparent plastic film (10) on the surface and the upper half of the spherical lens (14).

Next, a case where the lap time of a horse is measured using the apparatus of the present invention will be described. 5 to 7 show an automatic timekeeping device for horse racing using the barcode. FIG. 5 is a schematic diagram showing details of a barcode reader, and FIG. 6 shows a situation of a measuring position on a course. FIG. 7 is a schematic diagram showing measurement positions of the entire course. In FIG. 6, a horse (23) is running on the course, and the reading direction of the barcode (24) is perpendicular to the traveling direction of the horse (23) on the back of the horse (23). A bar code (24) is provided. Further, a column (26) is erected perpendicularly to the traveling direction of the horse (23) above the course, and six bar code readers (28) are mounted on the column (26). ) Is provided so that the reading direction is perpendicular to the traveling direction of the horse (23). Details of the barcode reader (28) will be described with reference to FIG. In the figure, (30) is a high-frequency modulator, and a semiconductor laser (32) that emits a near-infrared laser is provided downstream of the high-frequency modulator (30). Accordingly, the laser light emitted by the semiconductor laser (32) is modulated at a high frequency. On the downstream side of the optical path of the semiconductor laser (32), a semiconductor laser (32)
A collimator lens (34) for condensing the light is provided. Further, a hole (36) through which laser light passes is formed at the center on the further downstream side of the collimator lens (34), and a plane mirror (40) having an anti-slope (38) is provided on the downstream side. Further downstream of the plane mirror (40), there is provided a polygon mirror (42) having an octagonal prism shape, rotating about the column axis, and having a mirror surface on the outer peripheral surface. The polygon mirror (42) scans the light of the semiconductor laser (32) at an angle of 90 °. The polygon mirror (42)
Is applied to a bar code (24) provided on the back of the horse (23) with the reading direction perpendicular to the traveling direction, and the bar code (24) is provided with a light retroreflective material (8). Since it is provided, the laser light applied to the bar code (24) is reflected by the polygon mirror (42) and further sent to the plane mirror (40), and the laser light from the plane mirror (40) is The light enters the light receiving lens (46) located downstream. Further, a photodiode (50) is provided downstream of the light receiving lens (46) for receiving the laser light modulated at a high frequency and converting the laser light into an electric signal. The electric signal of the photodiode (50) is sent to a high-frequency filter (52) provided downstream of the photodiode (50), and the semiconductor laser (32) is modulated by the high-frequency modulator (30). It has a structure that allows only an electric signal of a frequency to pass. The above is the structure of the barcode reader (28). A signal processing device (54) is provided downstream of the bar code reader (28), and a plurality of bar code readers (28) are connected to the signal processing device (54). A clock (56) for outputting a time signal is connected to the signal processing device (54). The signal processing device (54) is provided with an electronic bulletin board (58) for displaying the result of the calculation.

Because of the above configuration, S, A,
When the horse (23) passes points B and C, a barcode reader (2
The laser beam from the semiconductor laser (32) in (8) is scanned by the polygon mirror (42) and strikes the barcode (24) provided on the back of the horse (23). Then, the portion of the barcode (24) where the laser light hits the light retroreflecting material (8) reflects the light to the polygon mirror (42) and becomes a flat mirror (4).
0), the light passes through the light receiving lens (46) and the photodiode (50), and is sent to the high frequency filter (52). The high frequency filter (52) receives only the signal from the semiconductor laser (32) and sends the signal to the signal processing device (54). The signal processor (54) receiving the signal calculates S, A, B, and C from the signal from the clock (56) and the signal from the bar code reader (28).
Obtain data as shown in Table 1 at the point.

In this manner, the lap time of each horse (23) can be automatically calculated, and the training order can be easily determined by selecting the one with the smallest lap time at goal C. The lap times in Table 1 calculated in this way can be used as necessary, as shown in FIG.
Can be expressed by using

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects. By using the light retroreflective material for the light reflecting portion of the barcode, the readable angle of the barcode is greatly widened, and the contents of the barcode can be read even from an oblique direction. The barcode is mounted so that the reading direction of the barcode is perpendicular to the traveling direction of the horse, and the required time is calculated from the barcode reader that reads the barcode and the signal and time signal of the barcode reader. By providing the arithmetic processing mechanism, the lap time of the horse can be automatically and accurately measured quickly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a barcode used in the apparatus of the present invention, FIG. 2 is a sectional view showing an example of a light retroreflective material,
FIG. 3 is a sectional view showing another embodiment of the light retroreflective material, FIG. 4 is a sectional view showing the principle of the light retroreflective material, and FIGS. 5 to 7 are horse races using the bar code. FIG. 5 is a schematic diagram showing details of a barcode reader,
FIG. 6 is a schematic diagram showing a situation of a measuring position on a course, and FIG.
FIG. 8 is a schematic view showing measurement positions of the entire course, FIG. 8 is a cross-sectional view showing a conventional bar code, and FIG. 9 is a cross-sectional view showing a light reflection state of the conventional bar code. 4 black paint, 6 light absorbing material 8 light retroreflective material, 10 transparent plastic film 12 spacing coating, 14 spherical lens 16 reflective film, 18 adhesive Layer 20 Liner 22 Air layer 24 Barcode 28 Barcode reader 32 Semiconductor laser 34 Collimator lens 38 Reflective surface 40 Flat mirror 42 Polygon mirror , 42 ... Light receiving lens 50 ... Photodiode

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location G06K 17/00 G06K 17/00 L

Claims (1)

(57) [Claims] 1. A bar code comprising a rod-shaped light absorbing portion and a light reflecting portion mounted on the back of a horse so that a reading direction is substantially perpendicular to a traveling direction of the horse, and constituting a signal. A bar code using a light-retroreflecting material for the light reflecting portion, and the bar code is installed above the measurement position of the running path of the horse with the bar code, and the reading direction of the bar code is relative to the traveling direction of the horse. A bar code reader that is almost vertical and the scanning angle of the reading laser beam is almost 90 degrees, and a plurality of bar code readers are arranged in the reading direction A lap time measuring device for a horse, comprising a mechanism.